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Author Topic: Speedo drive ratio compatibility?  (Read 352 times)

Offline scott s

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Speedo drive ratio compatibility?
« on: Oct 03, 2016, 08:27:53 »
I'm working on a front end swap. The new front end uses a 20mm axle. I'd like to keep the stock gauges, so I looked at bikes that use a 20mm axle and have a mechanical speedo drive.
 If I get, say, a Kawasaki speedo drive do I have to use a Kawasaki speedo? Were speedometers and drive ratios standardized?
  Do they differ within the same brand over the years. If I have early '70's Honda gauges, will a speedo drive from a late '80's-early '90's VFR have the correct drive ratio, for example?

Offline scott s

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Re: Speedo drive ratio compatibility?
« Reply #1 on: Oct 04, 2016, 07:47:02 »
  I have found that Honda (and probably Yamaha and Suzuki) were 2240 = 60mph. Kawasaki is 2440rpm = 60mph.
 While the ratios were somewhat standardized by manufacturer, the drives were slightly different to account for wheel size/diameter.

 My task now is to find a bike that used a 20mm axle and an 18" or 19" front wheel.

 Did any of the bikes in this list use 18" or 19" wheels?

20mm
Honda CB400 F 89-90, CBR600 Hurricane 89-90, CBR600 F
Hurricane 91-96, CBR600 SE 96, VT600 Shadow 88-97, NT650 Hawk
88-91, CB750 SC 91-93 & 95-97, RVF750 R RC45 94-95, VF750
C/C2/D 94-97, VFR750 F 86, VFR750 F Interceptor 88-97, PC800
Pacific Coast 89-90, CBR900 RR Hurricane 93-97, CBR1000 F
87-88 & 90-91 & 93-96, CBR1100 XX Blackbird 97, VT1100 C
Shadow 87-96, VT1100 C2 ACE Shadow 95-97, GL1500 88-97, GL1500
Valkyrie 96-97, Honda VF750 C/C2 98. Kawasaki ZX750 Ninja ZX-7
89-90. Suzuki GSX-R750 88-92, GSX-R750 W 92-95, Honda CR125
00-03, CR125 95-97, CR250 95-97, CR250 00-03, CR500 R 95-97.
Kawasaki KX125 93-97, KX250 93-97, KX500 94-97. Suzuki RM125
96-97, RM250 96-97. Yamaha YZ125 96-97, WR250 Z 97-98, YZ250
96-98, Kawasaki ZX600 E ZX-6 93-98, ZX600 F ZX-6R 95-97, VN800
Vulcan Classic 96-97, VN1500 D 96-97, Yamaha YZF750 R 94-97,
FZR1000 94-95, XVZ13 Royal Star 96